Fear Of The Unknown.

He realized something and he couldn't help but feel amused. 

He thought to himself in amusement, "They didn't need to put us in control of the lives of the slaves but they did."

It seems to him that these slaves are truly important for the survival of the blood crucible. Any irascible Shapiro that kills them might regret it. But their guides still gave the young and rash Shapiros power over the lives of the five. He couldn't help but think about the food fight that happened during their feeding sessions. 

He thought to himself, "They might just regret it this time around."

He was then taken to the end of the hall with his five slaves. There was a door at the end that only he and the slaves entered. His guide wished him well and turned back. The door slammed shut and was disconnected from the hall. Another door replaced the one that was closed. It will lead to another room and not the hall he came from.